Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Rheostat control Cascade control Combination of cascade and pole changing Pole changing Rheostat control Cascade control Combination of cascade and pole changing Pole changing ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The overall efficiency of steam locomotive is around 25 to 35 percent 35 to 45 percent 5 to 10 percent 15 to 20 percent 25 to 35 percent 35 to 45 percent 5 to 10 percent 15 to 20 percent ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the advantage of electric braking? It is instantaneous Motor continues to remain loaded during braking More heat is generated during braking It avoids wear of track It is instantaneous Motor continues to remain loaded during braking More heat is generated during braking It avoids wear of track ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is an advantage of electric traction over other methods of traction? All of the listed here Faster acceleration Better braking action No pollution problems All of the listed here Faster acceleration Better braking action No pollution problems ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the voltage for single phase A.C. system? 220 V 11 kV 5 kV 220 v 220 V 11 kV 5 kV 220 v ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The wheels of a train, engine as well as bogies, are slightly tapered to Increase friction Facilitate braking Facilitate in taking turns Reduce friction Increase friction Facilitate braking Facilitate in taking turns Reduce friction ANSWER DOWNLOAD EXAMIANS APP
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